WOWOWO [ 950 mA Lithium Battery Or No Battery, USB Charge , Water-resistant ] Wheel Light LED Bicycle Safety Light Lightweight Accessory Cool Bright LED Bike Accessory Helps to be Seen And Be Safe During Night Time Bike Riding 20 Bright LED Lights In Waterproof Tubing Comes with Velcro Strap for Battery Pack and Zip Ties for The Light String Cool Bright LED Bike Accessory Helps to be Seen And Be Safe During Night Time Bike Riding 20 Bright LED Lights In Waterproof Tubing Comes with Velcro Strap for Battery Pack and Zip Ties for The Light String Waterproof, Durable, and Flexible